As far as we know. The only source for the claim that Alice and Co are the reason for the ban is the dev. And from what I have seen there are a lot of characters in this game that do get sexual that are much more likely to be the reason. There's multiple lolis, there's incest in the form of mother daughter threesomes. The game wasn't exactly playing it safe.I'm usually more apathetic toward Patreon coming down on adult game because most of the time it's just like, yeah, I get it. I wish the rules weren't the way they are, but I don't really fault them or anything. But this sucks. The reasoning given (that Alice and the kids exist at all) is just completely absurd and it shows that the people calling the shots lack literally any nuance or cognitive reasoning, and the end result is that yeah, this is probably going to kill the game for a lot of people. It's not Arc's fault (at least as far as we know) but the truth of the matter is that making huge graphical changes and switching platforms and such this far into the game (not to mention all of the delays and time needed to accomplish this) is just going to cause a lot of people to throw their hands up in frustration and never look back. That's a real bummer. I guess I'll keep an ear out for news going forward but it's hard to not feel like this is the end.
Patreon is very often arbitrary and inconsistent in its enforcement of its rules, but for this case I kind of doubt that what the dev told us was really the reason.